Jesus tells his disciples that they are ‘the salt of the earth.’ Before the invention of refrigeration, salt was commonly used to preserve food, as well as to season it. Just as a small amount of salt makes a big difference to the flavour of food, Jesus calls his disciples to be people who make a difference to the world. The same idea is expressed by the image of being ‘the light of the world.’ The good works of the disciples of Christ should shine out, in our families and our communities. The prophet Isaiah tells us what are the good works that the Lord desires: feeding, clothing and sheltering the poor; renouncing violence and siding with the oppressed. Such works are the marks of the disciples of Christ. Without them, the Lord says, we are good for nothing.